<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>天气案例</title>
    <!-- 引入Vue -->
    <script type="text/javascript" src="../node_modules/vue/dist/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>今天天气很{{info}}</h2>
        <!-- 绑定事件的时候：@xxx="yyy" yyy 可以写一些简单的语句 -->
        <button @click="changeWeather">切换天气</button>
    </div>
</body>
<script type="text/javascript">
    const vm = new Vue({
        el: '#root',
        data: {
            isHot: true
        },
        computed: {
            info() {
                return this.isHot ? '炎热' : '凉爽';
            }
        },
        methods: {
            changeWeather(){
                this.isHot = !this.isHot;
            }
        }
    });
</script>
</html>